Preoperative Arterial Embolization to Avoid Intraoperative Bleeding during Endoscopic Sinus Surgery for Organized Hematoma of the Maxillary Sinus: A Case Series and Literature Review.

Purpose: This study aimed to evaluate the safety and efficacy of preoperative arterial embolization of organized hematoma of the maxillary sinus.

Material and methods: Seven patients who were pathologically diagnosed with an organized hematoma of the maxillary sinus and who underwent endoscopic sinus surgery following preoperative arterial embolization for the same from July 2013 to April 2020 at our hospital were included. A literature review of the PubMed database was performed to identify 13 cases on organized hematomas of the maxillary sinuses. The embolization and nonembolization groups comprised patients who underwent preoperative embolization (n = 10, seven from this study and three from literature) and those who did not undergo preoperative embolization (n = 10, from literature), respectively. Outcomes of embolization including embolization-related complications and postoperative bleeding were assessed, and volumes of intraoperative blood loss and duration of surgery were compared between the groups.

Results: No preoperative embolization-related complications were observed in our cases. The volume of surgical blood loss in the seven cases varied from 0 to 100 mL with a median of 30 mL, and the duration of surgery ranged from 45 to 166 minutes with a median of 112 minutes. The volume of blood loss was significantly lower for the embolization group than that for the nonembolization group (p = 0.0031). There was no statistically significant difference regarding duration of surgery between the groups (p > 0.10).

Conclusions: Preoperative embolization of an organized hematoma of the maxillary sinus is a safe and effective method that helps prevent serious intraoperative hemorrhage.